Merge branch 'cpufreq/qcom-updates' into cpufreq/arm/linux-next

This commit is contained in:
Viresh Kumar 2019-09-03 07:55:22 +05:30
commit f75d2accca
10 changed files with 566 additions and 272 deletions

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@ -1,25 +1,38 @@
Qualcomm Technologies, Inc. KRYO CPUFreq and OPP bindings
Qualcomm Technologies, Inc. NVMEM CPUFreq and OPP bindings
===================================
In Certain Qualcomm Technologies, Inc. SoCs like apq8096 and msm8996
that have KRYO processors, the CPU ferequencies subset and voltage value
of each OPP varies based on the silicon variant in use.
In Certain Qualcomm Technologies, Inc. SoCs like apq8096 and msm8996,
the CPU frequencies subset and voltage value of each OPP varies based on
the silicon variant in use.
Qualcomm Technologies, Inc. Process Voltage Scaling Tables
defines the voltage and frequency value based on the msm-id in SMEM
and speedbin blown in the efuse combination.
The qcom-cpufreq-kryo driver reads the msm-id and efuse value from the SoC
The qcom-cpufreq-nvmem driver reads the msm-id and efuse value from the SoC
to provide the OPP framework with required information (existing HW bitmap).
This is used to determine the voltage and frequency value for each OPP of
operating-points-v2 table when it is parsed by the OPP framework.
Required properties:
--------------------
In 'cpus' nodes:
In 'cpu' nodes:
- operating-points-v2: Phandle to the operating-points-v2 table to use.
In 'operating-points-v2' table:
- compatible: Should be
- 'operating-points-v2-kryo-cpu' for apq8096 and msm8996.
Optional properties:
--------------------
In 'cpu' nodes:
- power-domains: A phandle pointing to the PM domain specifier which provides
the performance states available for active state management.
Please refer to the power-domains bindings
Documentation/devicetree/bindings/power/power_domain.txt
and also examples below.
- power-domain-names: Should be
- 'cpr' for qcs404.
In 'operating-points-v2' table:
- nvmem-cells: A phandle pointing to a nvmem-cells node representing the
efuse registers that has information about the
speedbin that is used to select the right frequency/voltage
@ -678,3 +691,105 @@ soc {
};
};
};
Example 2:
---------
cpus {
#address-cells = <1>;
#size-cells = <0>;
CPU0: cpu@100 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x100>;
....
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
CPU1: cpu@101 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x101>;
....
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
CPU2: cpu@102 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x102>;
....
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
CPU3: cpu@103 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x103>;
....
clocks = <&apcs_glb>;
operating-points-v2 = <&cpu_opp_table>;
power-domains = <&cpr>;
power-domain-names = "cpr";
};
};
cpu_opp_table: cpu-opp-table {
compatible = "operating-points-v2-kryo-cpu";
opp-shared;
opp-1094400000 {
opp-hz = /bits/ 64 <1094400000>;
required-opps = <&cpr_opp1>;
};
opp-1248000000 {
opp-hz = /bits/ 64 <1248000000>;
required-opps = <&cpr_opp2>;
};
opp-1401600000 {
opp-hz = /bits/ 64 <1401600000>;
required-opps = <&cpr_opp3>;
};
};
cpr_opp_table: cpr-opp-table {
compatible = "operating-points-v2-qcom-level";
cpr_opp1: opp1 {
opp-level = <1>;
qcom,opp-fuse-level = <1>;
};
cpr_opp2: opp2 {
opp-level = <2>;
qcom,opp-fuse-level = <2>;
};
cpr_opp3: opp3 {
opp-level = <3>;
qcom,opp-fuse-level = <3>;
};
};
....
soc {
....
cpr: power-controller@b018000 {
compatible = "qcom,qcs404-cpr", "qcom,cpr";
reg = <0x0b018000 0x1000>;
....
vdd-apc-supply = <&pms405_s3>;
#power-domain-cells = <0>;
operating-points-v2 = <&cpr_opp_table>;
....
};
};

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@ -0,0 +1,19 @@
Qualcomm OPP bindings to describe OPP nodes
The bindings are based on top of the operating-points-v2 bindings
described in Documentation/devicetree/bindings/opp/opp.txt
Additional properties are described below.
* OPP Table Node
Required properties:
- compatible: Allow OPPs to express their compatibility. It should be:
"operating-points-v2-qcom-level"
* OPP Node
Required properties:
- qcom,opp-fuse-level: A positive value representing the fuse corner/level
associated with this OPP node. Sometimes several corners/levels shares
a certain fuse corner/level. A fuse corner/level contains e.g. ref uV,
min uV, and max uV.

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@ -13292,8 +13292,8 @@ QUALCOMM CPUFREQ DRIVER MSM8996/APQ8096
M: Ilia Lin <ilia.lin@kernel.org>
L: linux-pm@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/opp/kryo-cpufreq.txt
F: drivers/cpufreq/qcom-cpufreq-kryo.c
F: Documentation/devicetree/bindings/opp/qcom-nvmem-cpufreq.txt
F: drivers/cpufreq/qcom-cpufreq-nvmem.c
QUALCOMM EMAC GIGABIT ETHERNET DRIVER
M: Timur Tabi <timur@kernel.org>

View File

@ -132,8 +132,8 @@ config ARM_OMAP2PLUS_CPUFREQ
depends on ARCH_OMAP2PLUS
default ARCH_OMAP2PLUS
config ARM_QCOM_CPUFREQ_KRYO
tristate "Qualcomm Kryo based CPUFreq"
config ARM_QCOM_CPUFREQ_NVMEM
tristate "Qualcomm nvmem based CPUFreq"
depends on ARM64
depends on QCOM_QFPROM
depends on QCOM_SMEM

View File

@ -64,7 +64,7 @@ obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o
obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_HW) += qcom-cpufreq-hw.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRYO) += qcom-cpufreq-kryo.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_NVMEM) += qcom-cpufreq-nvmem.o
obj-$(CONFIG_ARM_RASPBERRYPI_CPUFREQ) += raspberrypi-cpufreq.o
obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o
obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o

View File

@ -127,6 +127,7 @@ static const struct of_device_id blacklist[] __initconst = {
{ .compatible = "qcom,apq8096", },
{ .compatible = "qcom,msm8996", },
{ .compatible = "qcom,qcs404", },
{ .compatible = "st,stih407", },
{ .compatible = "st,stih410", },

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@ -1,249 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*/
/*
* In Certain QCOM SoCs like apq8096 and msm8996 that have KRYO processors,
* the CPU frequency subset and voltage value of each OPP varies
* based on the silicon variant in use. Qualcomm Process Voltage Scaling Tables
* defines the voltage and frequency value based on the msm-id in SMEM
* and speedbin blown in the efuse combination.
* The qcom-cpufreq-kryo driver reads the msm-id and efuse value from the SoC
* to provide the OPP framework with required information.
* This is used to determine the voltage and frequency value for each OPP of
* operating-points-v2 table when it is parsed by the OPP framework.
*/
#include <linux/cpu.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#include <linux/soc/qcom/smem.h>
#define MSM_ID_SMEM 137
enum _msm_id {
MSM8996V3 = 0xF6ul,
APQ8096V3 = 0x123ul,
MSM8996SG = 0x131ul,
APQ8096SG = 0x138ul,
};
enum _msm8996_version {
MSM8996_V3,
MSM8996_SG,
NUM_OF_MSM8996_VERSIONS,
};
static struct platform_device *cpufreq_dt_pdev, *kryo_cpufreq_pdev;
static enum _msm8996_version qcom_cpufreq_kryo_get_msm_id(void)
{
size_t len;
u32 *msm_id;
enum _msm8996_version version;
msm_id = qcom_smem_get(QCOM_SMEM_HOST_ANY, MSM_ID_SMEM, &len);
if (IS_ERR(msm_id))
return NUM_OF_MSM8996_VERSIONS;
/* The first 4 bytes are format, next to them is the actual msm-id */
msm_id++;
switch ((enum _msm_id)*msm_id) {
case MSM8996V3:
case APQ8096V3:
version = MSM8996_V3;
break;
case MSM8996SG:
case APQ8096SG:
version = MSM8996_SG;
break;
default:
version = NUM_OF_MSM8996_VERSIONS;
}
return version;
}
static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
{
struct opp_table **opp_tables;
enum _msm8996_version msm8996_version;
struct nvmem_cell *speedbin_nvmem;
struct device_node *np;
struct device *cpu_dev;
unsigned cpu;
u8 *speedbin;
u32 versions;
size_t len;
int ret;
cpu_dev = get_cpu_device(0);
if (!cpu_dev)
return -ENODEV;
msm8996_version = qcom_cpufreq_kryo_get_msm_id();
if (NUM_OF_MSM8996_VERSIONS == msm8996_version) {
dev_err(cpu_dev, "Not Snapdragon 820/821!");
return -ENODEV;
}
np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
if (!np)
return -ENOENT;
ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");
if (!ret) {
of_node_put(np);
return -ENOENT;
}
speedbin_nvmem = of_nvmem_cell_get(np, NULL);
of_node_put(np);
if (IS_ERR(speedbin_nvmem)) {
if (PTR_ERR(speedbin_nvmem) != -EPROBE_DEFER)
dev_err(cpu_dev, "Could not get nvmem cell: %ld\n",
PTR_ERR(speedbin_nvmem));
return PTR_ERR(speedbin_nvmem);
}
speedbin = nvmem_cell_read(speedbin_nvmem, &len);
nvmem_cell_put(speedbin_nvmem);
if (IS_ERR(speedbin))
return PTR_ERR(speedbin);
switch (msm8996_version) {
case MSM8996_V3:
versions = 1 << (unsigned int)(*speedbin);
break;
case MSM8996_SG:
versions = 1 << ((unsigned int)(*speedbin) + 4);
break;
default:
BUG();
break;
}
kfree(speedbin);
opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), GFP_KERNEL);
if (!opp_tables)
return -ENOMEM;
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);
if (NULL == cpu_dev) {
ret = -ENODEV;
goto free_opp;
}
opp_tables[cpu] = dev_pm_opp_set_supported_hw(cpu_dev,
&versions, 1);
if (IS_ERR(opp_tables[cpu])) {
ret = PTR_ERR(opp_tables[cpu]);
dev_err(cpu_dev, "Failed to set supported hardware\n");
goto free_opp;
}
}
cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
NULL, 0);
if (!IS_ERR(cpufreq_dt_pdev)) {
platform_set_drvdata(pdev, opp_tables);
return 0;
}
ret = PTR_ERR(cpufreq_dt_pdev);
dev_err(cpu_dev, "Failed to register platform device\n");
free_opp:
for_each_possible_cpu(cpu) {
if (IS_ERR_OR_NULL(opp_tables[cpu]))
break;
dev_pm_opp_put_supported_hw(opp_tables[cpu]);
}
kfree(opp_tables);
return ret;
}
static int qcom_cpufreq_kryo_remove(struct platform_device *pdev)
{
struct opp_table **opp_tables = platform_get_drvdata(pdev);
unsigned int cpu;
platform_device_unregister(cpufreq_dt_pdev);
for_each_possible_cpu(cpu)
dev_pm_opp_put_supported_hw(opp_tables[cpu]);
kfree(opp_tables);
return 0;
}
static struct platform_driver qcom_cpufreq_kryo_driver = {
.probe = qcom_cpufreq_kryo_probe,
.remove = qcom_cpufreq_kryo_remove,
.driver = {
.name = "qcom-cpufreq-kryo",
},
};
static const struct of_device_id qcom_cpufreq_kryo_match_list[] __initconst = {
{ .compatible = "qcom,apq8096", },
{ .compatible = "qcom,msm8996", },
{}
};
/*
* Since the driver depends on smem and nvmem drivers, which may
* return EPROBE_DEFER, all the real activity is done in the probe,
* which may be defered as well. The init here is only registering
* the driver and the platform device.
*/
static int __init qcom_cpufreq_kryo_init(void)
{
struct device_node *np = of_find_node_by_path("/");
const struct of_device_id *match;
int ret;
if (!np)
return -ENODEV;
match = of_match_node(qcom_cpufreq_kryo_match_list, np);
of_node_put(np);
if (!match)
return -ENODEV;
ret = platform_driver_register(&qcom_cpufreq_kryo_driver);
if (unlikely(ret < 0))
return ret;
kryo_cpufreq_pdev = platform_device_register_simple(
"qcom-cpufreq-kryo", -1, NULL, 0);
ret = PTR_ERR_OR_ZERO(kryo_cpufreq_pdev);
if (0 == ret)
return 0;
platform_driver_unregister(&qcom_cpufreq_kryo_driver);
return ret;
}
module_init(qcom_cpufreq_kryo_init);
static void __exit qcom_cpufreq_kryo_exit(void)
{
platform_device_unregister(kryo_cpufreq_pdev);
platform_driver_unregister(&qcom_cpufreq_kryo_driver);
}
module_exit(qcom_cpufreq_kryo_exit);
MODULE_DESCRIPTION("Qualcomm Technologies, Inc. Kryo CPUfreq driver");
MODULE_LICENSE("GPL v2");

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@ -0,0 +1,352 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*/
/*
* In Certain QCOM SoCs like apq8096 and msm8996 that have KRYO processors,
* the CPU frequency subset and voltage value of each OPP varies
* based on the silicon variant in use. Qualcomm Process Voltage Scaling Tables
* defines the voltage and frequency value based on the msm-id in SMEM
* and speedbin blown in the efuse combination.
* The qcom-cpufreq-nvmem driver reads the msm-id and efuse value from the SoC
* to provide the OPP framework with required information.
* This is used to determine the voltage and frequency value for each OPP of
* operating-points-v2 table when it is parsed by the OPP framework.
*/
#include <linux/cpu.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#include <linux/soc/qcom/smem.h>
#define MSM_ID_SMEM 137
enum _msm_id {
MSM8996V3 = 0xF6ul,
APQ8096V3 = 0x123ul,
MSM8996SG = 0x131ul,
APQ8096SG = 0x138ul,
};
enum _msm8996_version {
MSM8996_V3,
MSM8996_SG,
NUM_OF_MSM8996_VERSIONS,
};
struct qcom_cpufreq_drv;
struct qcom_cpufreq_match_data {
int (*get_version)(struct device *cpu_dev,
struct nvmem_cell *speedbin_nvmem,
struct qcom_cpufreq_drv *drv);
const char **genpd_names;
};
struct qcom_cpufreq_drv {
struct opp_table **opp_tables;
struct opp_table **genpd_opp_tables;
u32 versions;
const struct qcom_cpufreq_match_data *data;
};
static struct platform_device *cpufreq_dt_pdev, *cpufreq_pdev;
static enum _msm8996_version qcom_cpufreq_get_msm_id(void)
{
size_t len;
u32 *msm_id;
enum _msm8996_version version;
msm_id = qcom_smem_get(QCOM_SMEM_HOST_ANY, MSM_ID_SMEM, &len);
if (IS_ERR(msm_id))
return NUM_OF_MSM8996_VERSIONS;
/* The first 4 bytes are format, next to them is the actual msm-id */
msm_id++;
switch ((enum _msm_id)*msm_id) {
case MSM8996V3:
case APQ8096V3:
version = MSM8996_V3;
break;
case MSM8996SG:
case APQ8096SG:
version = MSM8996_SG;
break;
default:
version = NUM_OF_MSM8996_VERSIONS;
}
return version;
}
static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
struct nvmem_cell *speedbin_nvmem,
struct qcom_cpufreq_drv *drv)
{
size_t len;
u8 *speedbin;
enum _msm8996_version msm8996_version;
msm8996_version = qcom_cpufreq_get_msm_id();
if (NUM_OF_MSM8996_VERSIONS == msm8996_version) {
dev_err(cpu_dev, "Not Snapdragon 820/821!");
return -ENODEV;
}
speedbin = nvmem_cell_read(speedbin_nvmem, &len);
if (IS_ERR(speedbin))
return PTR_ERR(speedbin);
switch (msm8996_version) {
case MSM8996_V3:
drv->versions = 1 << (unsigned int)(*speedbin);
break;
case MSM8996_SG:
drv->versions = 1 << ((unsigned int)(*speedbin) + 4);
break;
default:
BUG();
break;
}
kfree(speedbin);
return 0;
}
static const struct qcom_cpufreq_match_data match_data_kryo = {
.get_version = qcom_cpufreq_kryo_name_version,
};
static const char *qcs404_genpd_names[] = { "cpr", NULL };
static const struct qcom_cpufreq_match_data match_data_qcs404 = {
.genpd_names = qcs404_genpd_names,
};
static int qcom_cpufreq_probe(struct platform_device *pdev)
{
struct qcom_cpufreq_drv *drv;
struct nvmem_cell *speedbin_nvmem;
struct device_node *np;
struct device *cpu_dev;
unsigned cpu;
const struct of_device_id *match;
int ret;
cpu_dev = get_cpu_device(0);
if (!cpu_dev)
return -ENODEV;
np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
if (!np)
return -ENOENT;
ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");
if (!ret) {
of_node_put(np);
return -ENOENT;
}
drv = kzalloc(sizeof(*drv), GFP_KERNEL);
if (!drv)
return -ENOMEM;
match = pdev->dev.platform_data;
drv->data = match->data;
if (!drv->data) {
ret = -ENODEV;
goto free_drv;
}
if (drv->data->get_version) {
speedbin_nvmem = of_nvmem_cell_get(np, NULL);
if (IS_ERR(speedbin_nvmem)) {
if (PTR_ERR(speedbin_nvmem) != -EPROBE_DEFER)
dev_err(cpu_dev,
"Could not get nvmem cell: %ld\n",
PTR_ERR(speedbin_nvmem));
ret = PTR_ERR(speedbin_nvmem);
goto free_drv;
}
ret = drv->data->get_version(cpu_dev, speedbin_nvmem, drv);
if (ret) {
nvmem_cell_put(speedbin_nvmem);
goto free_drv;
}
nvmem_cell_put(speedbin_nvmem);
}
of_node_put(np);
drv->opp_tables = kcalloc(num_possible_cpus(), sizeof(*drv->opp_tables),
GFP_KERNEL);
if (!drv->opp_tables) {
ret = -ENOMEM;
goto free_drv;
}
drv->genpd_opp_tables = kcalloc(num_possible_cpus(),
sizeof(*drv->genpd_opp_tables),
GFP_KERNEL);
if (!drv->genpd_opp_tables) {
ret = -ENOMEM;
goto free_opp;
}
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);
if (NULL == cpu_dev) {
ret = -ENODEV;
goto free_genpd_opp;
}
if (drv->data->get_version) {
drv->opp_tables[cpu] =
dev_pm_opp_set_supported_hw(cpu_dev,
&drv->versions, 1);
if (IS_ERR(drv->opp_tables[cpu])) {
ret = PTR_ERR(drv->opp_tables[cpu]);
dev_err(cpu_dev,
"Failed to set supported hardware\n");
goto free_genpd_opp;
}
}
if (drv->data->genpd_names) {
drv->genpd_opp_tables[cpu] =
dev_pm_opp_attach_genpd(cpu_dev,
drv->data->genpd_names,
NULL);
if (IS_ERR(drv->genpd_opp_tables[cpu])) {
ret = PTR_ERR(drv->genpd_opp_tables[cpu]);
if (ret != -EPROBE_DEFER)
dev_err(cpu_dev,
"Could not attach to pm_domain: %d\n",
ret);
goto free_genpd_opp;
}
}
}
cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
NULL, 0);
if (!IS_ERR(cpufreq_dt_pdev)) {
platform_set_drvdata(pdev, drv);
return 0;
}
ret = PTR_ERR(cpufreq_dt_pdev);
dev_err(cpu_dev, "Failed to register platform device\n");
free_genpd_opp:
for_each_possible_cpu(cpu) {
if (IS_ERR_OR_NULL(drv->genpd_opp_tables[cpu]))
break;
dev_pm_opp_detach_genpd(drv->genpd_opp_tables[cpu]);
}
kfree(drv->genpd_opp_tables);
free_opp:
for_each_possible_cpu(cpu) {
if (IS_ERR_OR_NULL(drv->opp_tables[cpu]))
break;
dev_pm_opp_put_supported_hw(drv->opp_tables[cpu]);
}
kfree(drv->opp_tables);
free_drv:
kfree(drv);
return ret;
}
static int qcom_cpufreq_remove(struct platform_device *pdev)
{
struct qcom_cpufreq_drv *drv = platform_get_drvdata(pdev);
unsigned int cpu;
platform_device_unregister(cpufreq_dt_pdev);
for_each_possible_cpu(cpu) {
if (drv->opp_tables[cpu])
dev_pm_opp_put_supported_hw(drv->opp_tables[cpu]);
if (drv->genpd_opp_tables[cpu])
dev_pm_opp_detach_genpd(drv->genpd_opp_tables[cpu]);
}
kfree(drv->opp_tables);
kfree(drv->genpd_opp_tables);
kfree(drv);
return 0;
}
static struct platform_driver qcom_cpufreq_driver = {
.probe = qcom_cpufreq_probe,
.remove = qcom_cpufreq_remove,
.driver = {
.name = "qcom-cpufreq-nvmem",
},
};
static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
{ .compatible = "qcom,apq8096", .data = &match_data_kryo },
{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
{},
};
/*
* Since the driver depends on smem and nvmem drivers, which may
* return EPROBE_DEFER, all the real activity is done in the probe,
* which may be defered as well. The init here is only registering
* the driver and the platform device.
*/
static int __init qcom_cpufreq_init(void)
{
struct device_node *np = of_find_node_by_path("/");
const struct of_device_id *match;
int ret;
if (!np)
return -ENODEV;
match = of_match_node(qcom_cpufreq_match_list, np);
of_node_put(np);
if (!match)
return -ENODEV;
ret = platform_driver_register(&qcom_cpufreq_driver);
if (unlikely(ret < 0))
return ret;
cpufreq_pdev = platform_device_register_data(NULL, "qcom-cpufreq-nvmem",
-1, match, sizeof(*match));
ret = PTR_ERR_OR_ZERO(cpufreq_pdev);
if (0 == ret)
return 0;
platform_driver_unregister(&qcom_cpufreq_driver);
return ret;
}
module_init(qcom_cpufreq_init);
static void __exit qcom_cpufreq_exit(void)
{
platform_device_unregister(cpufreq_pdev);
platform_driver_unregister(&qcom_cpufreq_driver);
}
module_exit(qcom_cpufreq_exit);
MODULE_DESCRIPTION("Qualcomm Technologies, Inc. CPUfreq driver");
MODULE_LICENSE("GPL v2");

View File

@ -401,6 +401,54 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
/**
* dev_pm_opp_find_level_exact() - search for an exact level
* @dev: device for which we do this operation
* @level: level to search for
*
* Return: Searches for exact match in the opp table and returns pointer to the
* matching opp if found, else returns ERR_PTR in case of error and should
* be handled using IS_ERR. Error return values can be:
* EINVAL: for bad pointer
* ERANGE: no match found for search
* ENODEV: if device not found in list of registered devices
*
* The callers are required to call dev_pm_opp_put() for the returned OPP after
* use.
*/
struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level)
{
struct opp_table *opp_table;
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table)) {
int r = PTR_ERR(opp_table);
dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r);
return ERR_PTR(r);
}
mutex_lock(&opp_table->lock);
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
if (temp_opp->level == level) {
opp = temp_opp;
/* Increment the reference count of OPP */
dev_pm_opp_get(opp);
break;
}
}
mutex_unlock(&opp_table->lock);
dev_pm_opp_put_opp_table(opp_table);
return opp;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_exact);
static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table,
unsigned long *freq)
{
@ -1771,6 +1819,7 @@ static void _opp_detach_genpd(struct opp_table *opp_table)
* dev_pm_opp_attach_genpd - Attach genpd(s) for the device and save virtual device pointer
* @dev: Consumer device for which the genpd is getting attached.
* @names: Null terminated array of pointers containing names of genpd to attach.
* @virt_devs: Pointer to return the array of virtual devices.
*
* Multiple generic power domains for a device are supported with the help of
* virtual genpd devices, which are created for each consumer device - genpd
@ -1784,12 +1833,16 @@ static void _opp_detach_genpd(struct opp_table *opp_table)
*
* This helper needs to be called once with a list of all genpd to attach.
* Otherwise the original device structure will be used instead by the OPP core.
*
* The order of entries in the names array must match the order in which
* "required-opps" are added in DT.
*/
struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names)
struct opp_table *dev_pm_opp_attach_genpd(struct device *dev,
const char **names, struct device ***virt_devs)
{
struct opp_table *opp_table;
struct device *virt_dev;
int index, ret = -EINVAL;
int index = 0, ret = -EINVAL;
const char **name = names;
opp_table = dev_pm_opp_get_opp_table(dev);
@ -1815,14 +1868,6 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names
goto unlock;
while (*name) {
index = of_property_match_string(dev->of_node,
"power-domain-names", *name);
if (index < 0) {
dev_err(dev, "Failed to find power domain: %s (%d)\n",
*name, index);
goto err;
}
if (index >= opp_table->required_opp_count) {
dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n",
*name, opp_table->required_opp_count, index);
@ -1843,9 +1888,12 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names
}
opp_table->genpd_virt_devs[index] = virt_dev;
index++;
name++;
}
if (virt_devs)
*virt_devs = opp_table->genpd_virt_devs;
mutex_unlock(&opp_table->genpd_virt_dev_lock);
return opp_table;

View File

@ -96,6 +96,8 @@ unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev);
struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
unsigned long freq,
bool available);
struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level);
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq);
@ -128,7 +130,7 @@ struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name);
void dev_pm_opp_put_clkname(struct opp_table *opp_table);
struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table);
struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names);
struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs);
void dev_pm_opp_detach_genpd(struct opp_table *opp_table);
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
@ -200,6 +202,12 @@ static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
return ERR_PTR(-ENOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level)
{
return ERR_PTR(-ENOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq)
{
@ -292,7 +300,7 @@ static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const
static inline void dev_pm_opp_put_clkname(struct opp_table *opp_table) {}
static inline struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names)
static inline struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs)
{
return ERR_PTR(-ENOTSUPP);
}